Evidence map›Paper›PMID 33509254›Full record

SynthesisSystematic reviews2021

Inflammation scores as prognostic biomarkers in small cell lung cancer: a systematic review and meta-analysis.

Anne Winther-Larsen, Ninna Aggerholm-Pedersen, Birgitte Sandfeld-Paulsen

Open access · goldAbstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in Systematic reviews, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 35 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
35citing papers in PubMed, 3 pooled it
2.9field-weighted citation impact, top 7% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

35 citing papers in PubMed, 3 syntheses or guidelines pooled it, 47 citations in OpenAlex.

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  10. Chemotherapy plus bevacizumabWorld journal of gastrointestinal oncology · 2025
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  20. Lung cancer and risk of cardiovascular mortality.Frontiers in cardiovascular medicine · 2024
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors at 2 institutions in 1 country.

Anne Winther-LarsenDepartment of Clinical Biochemistry, Viborg Regional Hospital, Viborg, Denmark.
Ninna Aggerholm-PedersenDepartment of Clinical Oncology, Aarhus University Hospital, Aarhus, Denmark.
Birgitte Sandfeld-PaulsenDepartment of Clinical Biochemistry, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, 8200, Aarhus N, Denmark. birgne@rm.dk.ORCID 0000-0001-9884-9165
Aarhus University Hospital · DKRegionshospitalet Viborg · DK

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundInflammation scores based on general inflammation markers as leucocyte count or C-reactive protein have been evaluated as prognostic markers of inferior survival in several cancers. In small cell lung cancer (SCLC), however, inflammation scores are less studied. In the present study, we set out to perform a systematic review and meta-analysis investigating reported associations between inflammation scores and overall survival (OS) in SCLC.

methodsA literature search was performed in PubMed, Embase, Scopus, and Web of Science following the Preferred Reporting Items for Systematic and Meta-Analyses (PRISMA) guidelines. Of the identified publications, only studies in English containing original data evaluating inflammation scores as a prognostic factor in SCLC patients were included. Hazard ratios (HRs) for OS were pooled in a random-effects model.

resultsIn total, 33 articles were included evaluating eight different inflammation scores in 7762 SCLC patients. Seven of the identified scores were based on leucocyte count. Neutrophil-to-lymphocyte ratio (NLR) and platelet-to-lymphocyte (PLR) ratio were the most frequently evaluated scores (NLR: n = 23; PLR: n = 22). For NLR, a meta-analysis including 16 studies demonstrated that patients with a high NLR had a significantly shorter OS compared to patients with a low NLR (pooled HR = 1.39 (95% CI, 1.23-1.56)). For PLR, an association with survival could not be confirmed in a meta-analysis performed based on eight studies (pooled HR = 1.20 (95% CI, 0.96-1.51)).

conclusionsThis review identifies that inflammation scores based on general inflammation markers have some potential as prognostic biomarkers in SCLC. The meta-analyses indicated that NLR is associated with inferior OS, whereas an association between PLR and OS could not be confirmed. Thus, NLR could be a useful biomarker of OS in SCLC patients. SYSTEMATIC REVIEW REGISTRATION: The protocol for the study was submitted to the PROSPERO database (registration number CRD42020188553 ).

Indexed as

Lung NeoplasmsSmall Cell Lung CarcinomaBiomarkersHumansInflammationLymphocyte CountPrognosisBiomarkersGlasgow prognostic scoreInflammation scoresMeta-analysisNeutrophil-to-lymphocyte ratioPlatelet-to-lymphocyte ratioSmall cell lung cancerSurvival

Identifiers

PMID33509254
PMCPMC7844954
OpenAlexW3123970019

What OpenQuestion holds

Textmetadata
LicenceCC BY
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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.